THEMIS Explores Magnetosphere (IMAGE) NASA/Goddard Space Flight Center Caption NASA's THEMIS mission has overturned a longstanding belief about the interaction between solar particles and Earth's magnetic field. Credit NASA Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.